Equity Plans and Share-based Compensation (Schedule Of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Balance at beginning of year, Shares	986
Exercised, shares	(359)
Outstanding at end of year, shares	627
Exercisable at end of year, Shares	627
Balance at beginning of year, Weighted Average Exercise Price	$ 10.50
Exercised, Weighted Average Exercise Price	$ 7.91
Outstanding at end of year, Weighted Average Exercise Price	$ 11.98
Exercisable at end of year, Weighted Average Exercise Price	$ 11.98
Outstanding at end of year, Weighted Average Remaining Contractual Term (in years)	2.70
Outstanding at end of year, Aggregate Intrinsic Value	$ 38,735
Exercisable at end of year, Weighted Average Remaining Contractual Term (in years)	2.70
Exercisable at end of year, Aggregate Intrinsic Value	$ 38,735